Name: Anonymous 2016-10-13 17:28
https://en.wikipedia.org/wiki/NCR_315
The instructions could use a memory slab as either two 6-bit alphanumeric characters or as three 4-bit BCD characters
The addressable unit of memory on the NCR 315 series is a "slab", short for "syllable", consisting of 12 data bits and a parity bit
A slab may contain three digits (with at sign, comma, space, ampersand, point, and minus treated as digits) or two alphabetic characters of six bits each.
A slab may contain a decimal value from -99 to +999.
A numeric value contains up to eight slabs. If the value is negative then the minus sign is the leftmost digit of this row.
There are instructions to transform digits to or from alphanumeric characters.